Chiral or achiral, mesoporous carbon
US10023466B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2016 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Jul 29, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/48
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composition and a method for producing mesoporous carbon materials with a chiral or achiral organization. In the method, a polymerizable inorganic monomer is reacted in the presence of nanocrystalline cellulose to give a material of inorganic solid with cellulose nanocrystallites organized in a chiral nematic organization. The cellulose can be carbonized through thermal treatment under inert atmosphere (e.g., nitrogen or argon) and the silica may subsequently be removed using aqueous solutions of sodium hydroxide (NaOH) or hydrogen fluoride (HF) to give the stable mesoporous carbon materials that retain the chiral nematic structure of the cellulose. These materials may be obtained as free-standing films with very high surface area. Through control of the reaction conditions the pore-size distribution may be varied from predominantly microporous to predominantly mesoporous materials. These are the first materials to use cellulose as both the structural template and carbon source for a mesoporous carbon material. These are also the first carbon materials to combine mesoporosity with long-range chiral ordering. Possible applications for these materials include: charge storage device…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.